18628312 has 8 divisors (see below), whose sum is σ = 34928100. Its totient is φ = 9314152.

The previous prime is 18628307. The next prime is 18628319. The reversal of 18628312 is 21382681.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18628319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1164262 + ... + 1164277.

Almost surely, 2^18628312 is an apocalyptic number.

It is an amenable number.

18628312 is a deficient number, since it is larger than the sum of its proper divisors (16299788).

18628312 is a wasteful number, since it uses less digits than its factorization.

18628312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328545 (or 2328541 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 18628312 is about 4316.0528263681. The cubic root of 18628312 is about 265.0886709319.

The spelling of 18628312 in words is "eighteen million, six hundred twenty-eight thousand, three hundred twelve".